Gonzalez Lodge, Commentary on Plato: Gorgias

πάσχω πρός: as 482 c. The comparison, however sensible the thought therein expressed may be, still is not in place here. For it describes only the subjective impression which philosophizing at different periods of life makes on Callicles. It is therefore only a rhetorical reaffirmation of the statement that philosophy is not appropriate for a mature man. In his mind, however, Callicles has still a tertium comparationis which he does not express, viz. the objects of philosophical research afford no real interest, hence resemble παιδία. Further, so much trouble about single ideas is like ψελλίζεσθαι (stammering). On the contrary, σαφῶς διαλέγεσθαι (λέγειν) is the business of orators.

ἐλευθέριον: Callicles speaks of stammering thus, as contrasted with the restraint which the child must exercise in order to learn to speak clearly, which latter seems to him to be δουλοπρεπές. Note also the contrast in χαρίεν and πικρόν.